Mix the rolled oats, cinnamon, baking powder, and salt in a medium-sized bowl. Put aside.
Add the eggs, milk, vanilla, and bananas to the container of a blender. Process till smooth. Blend the dry ingredients in until smooth one more. While the griddle is heating up, keep the batter in the container.
Heat a skillet or pancake griddle to medium. Use cooking spray or butter to coat the griddle.
Spoon about 1/4 cup of batter onto the griddle using an ice cream scoop or large cookie scoop. Pancakes should be at least one inch apart.
Cook for about 2 minutes, or until the edges are firm and tiny bubbles begin to appear, on the first side of the pancake. After flipping, cook the pancake for a further two minutes, or until golden brown. Proceed with the leftover batter.